What is my ex added me back on snapchat?

As an AI language model, I do not have access to your personal information or experiences. However, generally speaking, if your ex added you back on Snapchat, it may indicate that they are interested in reconnecting or keeping in touch. It could also be a friendly gesture or curiosity to see how you are doing. It is important to approach the situation with an open mind and communicate openly with your ex to avoid misunderstandings.